gesture-recognizer: Clean up GestureConsumer.

 * Remove GestureConsumer::ignores_events_ since it's no longer necessary.
 * Remove Mirrored and CancelledTouchEvent.

BUG=none
R=tdresser@chromium.org, varunjain@chromium.org

Review URL: https://codereview.chromium.org/28773005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229925 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229925
Get rid of is_hidden booleans in RenderWidgetHostView platform implementations that mirror the same variable in RenderWidgetHostImpl. It's error prone to keep the two in sync.

R=jamesr@chromium.org

Review URL: https://codereview.chromium.org/29373002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229926 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229926